Wynnewood, PA
1201 Andover Road
Wynnewood PA 19096
Phone: (610) 995-6260
Email: adam@grayoakroofing.com
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Proudly serving the Main Line and the broader Montgomery, Delaware, Chester counties.
Residential Window Replacement & Installation
High-performance window solutions installed with the same precision and care as our signature roofing services.
Windows That Work as Hard as the Rest of Your Home
Your windows do more than let in light. They’re a primary barrier against heat loss, cold infiltration, outside noise, and moisture. When they’re performing well you don’t notice them. When they’re not — drafts in winter, condensation between the panes, frames that stick or won’t lock — they affect your comfort, your energy bills, and the character of your home every single day.
At Gray Oak Roofing & Exteriors, we install replacement and new construction windows for homeowners across Montgomery, Delaware, and Chester Counties. We work with Marvin, Pella, and Andersen and match the right product to your home’s architecture, your performance requirements, and your long-term goals.
What We Offer
Full Window Replacement
Full replacement — removing the existing window including the frame, rough opening, and exterior trim — is the right approach when frames are rotted, structurally compromised, or when you want to change the window size or profile. It’s a more involved installation than a pocket replacement but it gives you a completely fresh start and the opportunity to address any water damage, air sealing deficiencies, or insulation gaps in the rough opening that have been hidden behind the old frame.
Insert / Pocket Replacement
An insert replacement fits a new window unit into the existing frame, preserving the interior and exterior trim. It’s less disruptive, typically faster, and the right choice when the existing frame is structurally sound and you’re not changing the window size. For older homes throughout the Main Line where original millwork and interior casings are worth preserving, a well-executed insert replacement lets you upgrade window performance without touching the surrounding detail work.
New Construction Windows
For additions, conversions, and new openings, we install new construction windows with integral nailing fins that tie into the wall framing and weather-resistant barrier. Proper flashing, sequencing, and air sealing at the rough opening are as important as the window unit itself — done correctly, a new construction window installation should perform without issue for the life of the frame.
Why Windows Matter in This Region
Homes throughout Montgomery, Delaware, and Chester Counties span more than a century of construction — from pre-war colonials and Tudors to postwar ranches and contemporary builds. Older homes present the most nuanced window challenges. Original wood windows in pre-1960 homes throughout Bryn Mawr, Merion Station, Haverford, and the broader Main Line corridor were often exceptionally well made, but decades of weathering and deferred maintenance have compromised their air sealing and thermal performance significantly. The choice between restoration and replacement, and between an insert and a full replacement, requires real judgment about what the home needs and what the homeowner values.
Energy performance is a genuine consideration across all housing ages in our climate. The Philadelphia region’s combination of hot humid summers and cold winters means windows are working against the outdoor environment in both directions for much of the year. Modern double and triple-pane units with low-e coatings and argon gas fills reduce heating and cooling load, minimize condensation, and improve interior comfort year-round.
Noise reduction is an underappreciated benefit of quality window replacement — particularly on homes near Route 30, Route 202, the Main Line rail corridor, or busy suburban roads throughout Ardmore, Narberth, Wayne, and the surrounding communities. Laminated glass and multi-pane construction significantly reduce exterior noise transmission, a difference homeowners notice immediately after installation.
The Gray Oak Standard
A window installation is only as good as what happens around the window — the flashing, the air sealing, the insulation at the sill and jambs, the integration with the water-resistive barrier. A premium window unit installed carelessly into a poorly prepared rough opening will underperform a mid-grade unit installed with precision every time.
Every window project is managed personally from estimate to completion — one contact, one standard, start to finish. We select products we stand behind from manufacturers we trust, prepare every opening properly, and finish each installation to the standard the home deserves. When the work is done you’ll know exactly what was installed and why — and you’ll have a direct line back to us if anything comes up after completion.
Window Types
We install the full range of residential window profiles. Double-hung windows are the most common choice for the colonial and traditional-style homes throughout our service area — both sashes operate vertically, both tilt in for cleaning, and they’re available from all three manufacturers we carry in every frame material. Casement windows hinge at the side and crank outward, creating a full unobstructed opening and a tight perimeter seal when latched — a strong choice where air sealing and ventilation are priorities.
Sliding windows suit wide horizontal openings and contemporary architecture. Bay and bow windows project outward from the wall plane, adding interior space, exterior character, and significantly more light — properly supported at the roof and sill, they’re a meaningful upgrade in the right room. Picture and fixed windows admit light and frame views without an operable sash, and awning windows hinged at the top allow ventilation even in light rain. We’ll recommend the right profile for each opening based on your home’s architecture and how the space is used.
Common in: Double-hung is the dominant profile on the colonials and traditional-style homes throughout Havertown, Ardmore, Wynnewood, Narberth, and Media. Casement and picture windows increasingly specified on the contemporary and transitional builds in Wayne, Newtown Square, and Radnor.
Frame Materials
Vinyl is the most widely installed replacement window frame material and the right choice for homes where low maintenance and value are the primary criteria. We specify heavy-wall vinyl with reinforced sash corners from Pella and Andersen — not the thin-wall commodity product common at the big-box level. Fiberglass, available through Marvin’s Integrity line and Pella’s Impervia series, is the most dimensionally stable frame material available — it expands and contracts at nearly the same rate as glass, holds its seal over decades of thermal cycling, and delivers slim sight lines that approach wood without the maintenance.
Wood windows from Marvin and Andersen offer authentic character and full paintability — the right specification for historic restorations and high-end new construction where interior finish quality matters. Aluminum-clad wood combines a wood interior with a factory-formed aluminum exterior shell, giving you the warmth and authenticity of wood inside and the durability of a factory finish outside. It’s one of the most popular specifications on premium Main Line renovations — particularly on the older homes of Gladwyne, Merion Station, Bryn Mawr, and Villanova — and the most complete answer to the restoration versus replacement conversation on older homes.
Get Started Today
As a local roofing company, we’re here to help you protect what matters most, your home.
Contact Us
Wynnewood, PA
Phone: (610) 995-6260
Email: adam@grayoakroofing.com
Locations
Signs It's Time to Replace Your Windows
- Drafts around the frame or sash — air infiltration you can feel with your hand on a cold day
- Condensation or fogging between the panes — a failed insulating glass seal that cannot be repaired
- Visible rot, soft spots, or paint failure on wood frames
- Windows that are difficult to open, close, or lock
- Single-pane glass throughout — significant thermal and acoustic performance gap versus modern units
- Outside noise transmission that disrupts sleep or daily life — particularly near rail lines and busy roads
- Visible gaps between the fr
What to Expect
- In-Home Consultation — We assess your existing windows, discuss your goals, and recommend the right replacement approach and products for your home's architecture and budget.
- Product Selection — We walk you through frame material, glass package, profile, and finish options from Marvin, Pella, and Andersen. We recommend what's right for your home.
- Measurement & Order — Precise measurements of every opening, factory order placed, realistic lead time confirmed before you commit.
- Scheduling — Installation scheduled once product arrives. One point of contact throughout.
- Installation — Proper rough opening preparation, air sealing, flashing, and insulation at every opening before the window goes in. Interior and exterior trim finished to match existing conditions.
- Final Walkthrough — We operate every window with you, confirm hardware and weatherstrip function, and address any questions before we consider the job complete.
- Follow-Up — Direct line back to the person who managed your project if anything comes up after installation.
Insert replacement or full replacement — how do I know which I need?
The key factor is the condition of your existing frames. If the frames are structurally sound — no rot, no significant movement, no moisture damage — an insert replacement is typically the right choice. It’s less disruptive, preserves your interior and exterior trim, and produces excellent results when done correctly. If the frames are compromised, if you want to change the window size, or if there’s evidence of water damage behind the existing frame, a full replacement is the better investment. We assess this at every estimate and give you a clear recommendation rather than defaulting to the more expensive option.
What glass package should I specify?
For most homes in the Philadelphia region, a double-pane unit with a low-e coating and argon gas fill is the right baseline. Low-e coatings reduce solar heat gain in summer and heat loss in winter. Triple-pane glass offers additional thermal and acoustic performance and is worth specifying on north-facing exposures, rooms adjacent to noisy roads or the rail corridor, or homes where heating costs are a significant concern. We’ll walk you through the glass options for your specific situation at the consultation.
How long does window replacement take?
For most whole-home replacement projects, installation runs one to two days depending on the number of openings and complexity of the work. Individual room replacements are typically completed in a single day. The longer lead time in a window project is usually manufacturing and delivery — which varies by manufacturer, product line, and time of year. We give you a realistic timeline at the point of order so you can plan accordingly.
Will new windows actually reduce my energy bills?
Yes — with realistic expectations about the magnitude. Replacing single-pane or failed double-pane windows with modern low-e units will reduce heating and cooling load, improve comfort near the glass, and eliminate the drafts that make older windows feel so costly to heat around. What you’ll notice most immediately is improved comfort, reduced condensation, and quieter rooms. The utility savings follow.
Can new windows preserve the historic character of my older home?
Yes — and this is where manufacturer selection and product specification matter most. Marvin’s Signature and Andersen’s A-Series both produce windows with slim sight lines, authentic divided light options, and interior wood profiles that read as period-appropriate on pre-1960 homes. Aluminum-clad wood windows give you an exterior that weathers well and an interior that matches original millwork closely. We take historic character seriously on older Main Line homes — it’s one of the reasons we carry the manufacturers we do.
How does window installation quality affect performance?
Significantly — and it’s the factor most often overlooked in window discussions that focus purely on the product. A premium window unit installed into a poorly prepared rough opening, without proper air sealing at the sill and jambs, without correctly lapped flashing at the head, and without proper integration with the wall’s water-resistive barrier, will underperform a mid-grade unit installed correctly. The window is only as good as the opening it goes into. This is particularly relevant on the older homes throughout Bryn Mawr, Haverford, and Merion Station where decades of settling and previous work may have compromised the rough opening conditions.
What's the difference between Marvin, Pella, and Andersen?
All three are established manufacturers with broad product lines and genuine quality at their respective price points — the differences are in product range, construction methods, and where each excels. Marvin is the premium specification, with the widest range of custom sizing, material, and profile options and a reputation for finish quality that suits the most architecturally demanding projects. Andersen’s A-Series and 400 Series cover a broad mid-range with strong performance credentials and wide color availability. Pella’s Architect Series and Impervia fiberglass line round out a range that serves both the renovation and replacement markets well. We’ll recommend the right manufacturer and product line for your specific home and budget at the consultation.
Should I replace all my windows at once or in phases?
A whole-home replacement in a single project is more efficient — one mobilization, consistent product across all elevations, and a unified appearance inside and out. Phasing is a reasonable approach when budget is the constraint, with the practical consideration that window product lines change over time and matching a product specified today in a future phase may be difficult if the line is discontinued or updated. If you’re planning to phase, we’ll flag any products with known discontinuation risk and recommend which rooms or elevations to prioritize first based on condition and energy impact.
Are there any incentives or rebates available for window replacement?
Federal tax credits for energy-efficient home improvements have been available under the Inflation Reduction Act and may apply to qualifying window products — specifically those meeting ENERGY STAR Most Efficient criteria. Pennsylvania also has utility rebate programs through PECO and PPL that periodically include window replacement incentives. We recommend checking current availability with your tax advisor and utility provider before finalizing your product selection, as programs and eligible products change. We can confirm which products in our lineup carry ENERGY STAR certification at the consultation.
How do I maintain new windows to get the most out of them?
Most modern window frames — vinyl, fiberglass, and aluminum-clad wood exteriors — require minimal maintenance beyond periodic cleaning. Wood interiors benefit from repainting or restaining on a regular cycle to protect the wood from moisture. Hardware should be lubricated annually and weatherstripping inspected for compression and seal. The most important maintenance task is keeping the perimeter caulk joints at the exterior frame in good condition — failed caulk is the most common path for water to reach the rough opening behind the frame. A brief annual inspection of the exterior caulk joints and immediate attention to any gaps or cracking will protect the installation for the life of the window.